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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/113313] execute_command_line hangs at run time
Date: Thu, 11 Jan 2024 05:49:10 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113313

kargl at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kargl at gcc dot gnu.org

--- Comment #1 from kargl at gcc dot gnu.org ---
Created attachment 57034
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D57034&action=3Dedit
patch to execute_command_line.c

Code compiles and runs on FreeBSD.  That said, I see

% gfcx -o z a.f90 -g && ./z
I am john F
I am JOHN F
% valgrind ./z
=3D=3D18812=3D=3D Memcheck, a memory error detector
=3D=3D18812=3D=3D Copyright (C) 2002-2022, and GNU GPL'd, by Julian Seward =
et al.
=3D=3D18812=3D=3D Using Valgrind-3.22.0 and LibVEX; rerun with -h for copyr=
ight info
=3D=3D18812=3D=3D Command: ./z
=3D=3D18812=3D=3D=20
=3D=3D18812=3D=3D Conditional jump or move depends on uninitialised value(s)
=3D=3D18812=3D=3D    at 0x4B0AD79: _gfortran_execute_command_line_i4
(execute_command_line.c:203)
=3D=3D18812=3D=3D    by 0x400B2A: iam.0 (a.f90:15)
=3D=3D18812=3D=3D    by 0x400BE1: MAIN__ (a.f90:5)
=3D=3D18812=3D=3D    by 0x400CEF: main (a.f90:6)
=3D=3D18812=3D=3D=20
I am john F
=3D=3D18812=3D=3D Conditional jump or move depends on uninitialised value(s)
=3D=3D18812=3D=3D    at 0x4B0AD79: _gfortran_execute_command_line_i4
(execute_command_line.c:203)
=3D=3D18812=3D=3D    by 0x400B2A: iam.0 (a.f90:15)
=3D=3D18812=3D=3D    by 0x400C8B: MAIN__ (a.f90:6)
=3D=3D18812=3D=3D    by 0x400CEF: main (a.f90:6)
=3D=3D18812=3D=3D=20
I am JOHN F
=3D=3D18812=3D=3D=20
=3D=3D18812=3D=3D HEAP SUMMARY:
=3D=3D18812=3D=3D     in use at exit: 0 bytes in 0 blocks
=3D=3D18812=3D=3D   total heap usage: 26 allocs, 26 frees, 9,873 bytes allo=
cated

Looking at the code around line 203 suggests that there may be some confusi=
on
with setting the error status.  The attached patch allows the code to
run without the valgrind warnings.=